/**
 * User:langchen
 * Date:2022-08-23
 * Time:23:07
 */
public class Twenty_one {
    public static void main(String[] args) {
        System.out.println("2022.08.23搞了牛客网的推广，刷了几道题，牛客网推广正式开始，加油！");
    }
}
